from rest_framework import serializers
from goods.models import SKU
class CartSerializer(serializers.Serializer):
    """
       购物车数据序列化器
       """
    sku_id = serializers.IntegerField(label='商品id ', min_value=1)
    count = serializers.IntegerField(label='购买数量', min_value=1)
    selected = serializers.BooleanField(label='是否勾选', default=True)



    def validate_sku_id(self,value):
        try:
            SKU.objects.get(id =value)
        except SKU.DoesNotExist:
            raise serializers.ValidationError('商品不存在')
        return value

class CartSKUSerializer(serializers.ModelSerializer):
    """购物车查询"""
    count = serializers.IntegerField(label='购买数量')
    selected =serializers.BooleanField(label='商品勾选状态')
    class Meta:
        model =SKU
        fields = ['id', 'name', 'default_image_url', 'price', 'count', 'selected']

class CartDeleteSerializer(serializers.Serializer):
    """
      删除购物车数据序列化器
      """
    sku_id = serializers.IntegerField(label='商品id ', min_value=1)

    def validate_sku_id(self, value):
        try:
            SKU.objects.get(id=value)
        except SKU.DoesNotExist:
            raise serializers.ValidationError('商品不存在')
        return value


class CartSelectAllSerializer(serializers.Serializer):
    """
        购物车全选
        """
    selected =serializers.BooleanField(label='全选')
